The New Control Scheme for the PV and Wind Hybrid System Connected to the Single Phase Grid
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ORIGINAL ARTICLE
The New Control Scheme for the PV and Wind Hybrid System Connected to the Single Phase Grid Deekshitha S. Nayak1 · R. Shivarudraswamy1 · Florent Drossard2 Received: 13 December 2018 / Revised: 9 October 2019 / Accepted: 8 April 2020 © The Korean Institute of Electrical Engineers 2020
Abstract The proposed system comprises of the hybrid (PV and wind) system for 1 kw is integrated with the single phase grid. The new control scheme sine pulse width modulation (SPWM) switching with a deadbeat based PI controller is designed to a DC/AC single phase inverter. This controller is used to pure sinusoidal output voltage with low total harmonic distortion (THD), fast dynamic response control techniques and to keep the power output constant if any variation in the input from the PV and wind system occurs, and the output voltage at the grid remains constant. Even when the load varies, the sinusoidal voltage output maintains 230Vrms with 50 Hz frequency and also low THD is 2.54%. This controller proves the stiffness and robustness characteristics for maintaining the output voltage at desired value with low harmonics. Keywords PV panel · Wind system · DC bus · Single phase inverter · Controller
1 Introduction With the constant growth of the global population, the requirements for electricity are increasing. The conventional energy sources like oil, gas and coal cause pollution to the environment. So the renewable energies are the alternative to this issue. The solar and wind energies are the most used as the source of energy because it is eco-friendly and available in an abundant amount. However, these two energies are intermittent; in order to have a system that can provide electricity continuously, a hybrid system (wind and PV) is modelled. In industry, according to the IEEE Standard 5191992, the total harmonic distortion voltage (THD) should not exceed 5%. According to IEEE 1547, the inverter should be efficient and comply with the requirements of the harmonic control, interconnections, and safety standards [1]. In general, for generating a low distortion voltage output, there are many methods. One of them is the optimum fixed LC compensator, used to design for minimizing the expected value of the total harmonic distortion, which is desirable for maintaining the precise value of the power factor (PF). The * R. Shivarudraswamy [email protected] 1
Manipal Institute of Technology, Manipal, India
Engineering School ESIGELEC, Rouen, France
2
hybrid series active power filters or series and shunt compensation can be employed for eliminating the harmonics when nonlinear loads are associated to an inverter. However, the proper use of reactive shunt compensators and filters may enhance the harmonic current content and voltage distortion in the feeder of the systems. The usage of pure capacitive compensators combined with source harmonics would degrade the power factor and overload the equipment. In the series active filters in two-level pulse width modulation based inverters have the disadvantages
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